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feat(enemy): 选招器支持防重复折扣——WeightedRandomAntiRepeat

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上一次选中的招按 EnemyStatsSO.attackAntiRepeatFactor 折扣权重（默认 0.3）。
折扣把唯一候选压到 0 时退化为 Priority 路径，不会出现敌人永不出手。
阶段切换清空防重复记忆。取代 BossBase.UseBossSkillWeighted 里的同名逻辑。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
joywayer
2026-07-30 12:43:01 +08:00
co-authored by Claude Opus 5
parent b0fd040904
commit eb3f4888a4
6 changed files with 132 additions and 12 deletions
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Assets/_Game/Scripts/Enemies/Abilities/AttackSelectionMode.cs
+3 -2
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@@ -3,7 +3,8 @@ namespace BaseGames.Enemies.Abilities
/// <summary>多攻击选招策略。</summary>
public enum AttackSelectionMode
{
WeightedRandom, // 合格集内按 weight 加权随机
Priority // 合格集内取 priority 最高（并列取首个）
WeightedRandom, // 合格集内按 weight 加权随机
Priority, // 合格集内取 priority 最高（并列取首个）
WeightedRandomAntiRepeat, // 同 WeightedRandom，但对上一次选中的招施加权重折扣，压低连续重复
}
}
Assets/_Game/Scripts/Enemies/Abilities/EnemyAttackSelector.cs
+40 -9
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@@ -12,15 +12,26 @@ namespace BaseGames.Enemies.Abilities
private readonly List<IAttackCandidate> _candidates;
// 权重缓冲区（与 _candidates 等长，每次选招复用）：避免每次选招 new List 造成 GC
private readonly List<float> _weightBuf;
// 防重复折扣系数：0 = 有替代时绝不连续重复，1 = 不惩罚
private readonly float _antiRepeatFactor;
public EnemyAttackSelector(IEnumerable<IAttackCandidate> candidates)
private IAttackCandidate _lastPicked;
public EnemyAttackSelector(IEnumerable<IAttackCandidate> candidates, float antiRepeatFactor = 0.3f)
{
_candidates = new List<IAttackCandidate>(candidates);
_weightBuf = new List<float>(_candidates.Count);
_candidates = new List<IAttackCandidate>(candidates);
_weightBuf = new List<float>(_candidates.Count);
_antiRepeatFactor = Mathf.Clamp01(antiRepeatFactor);
}
public int Count => _candidates.Count;
/// <summary>上一次实际选中的招（防重复折扣的作用对象；供测试与调试面板读取）。</summary>
public IAttackCandidate LastPicked => _lastPicked;
/// <summary>对象池复用 / 阶段切换时清除防重复记忆。</summary>
public void ResetRepeatMemory() => _lastPicked = null;
private static bool Eligible(IAttackCandidate c, bool hasLOS, bool grounded)
=> c != null && c.CanUse && c.InAttackRange()
&& (!c.RequiresLineOfSight || hasLOS)
@@ -34,9 +45,24 @@ namespace BaseGames.Enemies.Abilities
}
public IAttackCandidate Select(bool hasLOS, bool grounded, AttackSelectionMode mode)
=> mode == AttackSelectionMode.Priority
? SelectByPriority(hasLOS, grounded)
: SelectByWeight(hasLOS, grounded);
{
switch (mode)
{
case AttackSelectionMode.Priority:
return Remember(SelectByPriority(hasLOS, grounded));
case AttackSelectionMode.WeightedRandomAntiRepeat:
return Remember(SelectByWeight(hasLOS, grounded, antiRepeat: true));
default:
return Remember(SelectByWeight(hasLOS, grounded, antiRepeat: false));
}
}
// 只在真选中了东西时更新记忆：选空时保留上一招，避免"空一帧就清掉防重复"。
private IAttackCandidate Remember(IAttackCandidate pick)
{
if (pick != null) _lastPicked = pick;
return pick;
}
private IAttackCandidate SelectByPriority(bool hasLOS, bool grounded)
{
@@ -50,20 +76,25 @@ namespace BaseGames.Enemies.Abilities
return best;
}
private IAttackCandidate SelectByWeight(bool hasLOS, bool grounded)
private IAttackCandidate SelectByWeight(bool hasLOS, bool grounded, bool antiRepeat)
{
// 有效权重：不合格候选填 0（由共享原语保证零权重项绝不被选中）。缓冲区复用 → 选招零 GC。
_weightBuf.Clear();
for (int i = 0; i < _candidates.Count; i++)
{
var c = _candidates[i];
_weightBuf.Add(Eligible(c, hasLOS, grounded) ? Mathf.Max(0f, c.Weight) : 0f);
float w = Eligible(c, hasLOS, grounded) ? Mathf.Max(0f, c.Weight) : 0f;
// 防重复：上一招权重打折。折扣可把权重压到 0——此时若它是唯一候选，
// 下面的 Priority 退化路径会把它选出来，不会出现"敌人永远不出手"。
if (antiRepeat && w > 0f && ReferenceEquals(c, _lastPicked))
w *= _antiRepeatFactor;
_weightBuf.Add(w);
}
int idx = BaseGames.Core.WeightedPick.Index(_weightBuf);
if (idx >= 0) return _candidates[idx];
// 无正权重（合格候选权重全 0）→ 退化为按 Priority 选(并列取首个)
// 无正权重（合格候选权重全 0，或全被防重复折扣压平）→ 退化为按 Priority 选(并列取首个)
return SelectByPriority(hasLOS, grounded);
}
}
Assets/_Game/Scripts/Enemies/Boss/BossBase.cs
+2
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@@ -184,6 +184,8 @@ namespace BaseGames.Enemies
_currentPhase = phase;
LastUsedSkillId = null; // 新阶段重置权重惩罚，防止跨阶段漂移
// 新阶段换招池，上一阶段的防重复记忆不应跨阶段影响选招
AttackSelector?.ResetRepeatMemory();
_onBossPhaseChanged?.Raise(new BossPhaseEvent
{
BossId = _bossId,
Assets/_Game/Scripts/Enemies/EnemyBase.cs
+4 -1
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@@ -601,7 +601,10 @@ namespace BaseGames.Enemies
candidates.Add(ab);
}
}
_attackSelector = new Abilities.EnemyAttackSelector(candidates);
// 折扣系数是策划配置项，未配 StatsSO 的敌人用 0.3 这个合法业务缺省（非掩盖漏配：
// 该模式本身是可选的，没配就等于用默认折扣）。
float antiRepeat = _statsSO != null ? _statsSO.attackAntiRepeatFactor : 0.3f;
_attackSelector = new Abilities.EnemyAttackSelector(candidates, antiRepeat);
}
protected virtual void Update()
Assets/_Game/Scripts/Enemies/EnemyStatsSO.cs
+4
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@@ -44,6 +44,10 @@ namespace BaseGames.Enemies
public BaseGames.Enemies.Abilities.AttackSelectionMode attackSelectionMode
= BaseGames.Enemies.Abilities.AttackSelectionMode.WeightedRandom;
[Tooltip("WeightedRandomAntiRepeat 模式下，上一次选中的招的权重折扣系数。" +
"0 = 有替代招时绝不连续重复；1 = 不惩罚。仅该模式生效")]
[Range(0f, 1f)] public float attackAntiRepeatFactor = 0.3f;
[Header("追击 & AI 阶段")]
[Tooltip("是否有警觉状态：勾选=未发现态进入视野先进警觉(朝向+警觉动画)再追击；不勾选=进入追逐感知直接追击")]
public bool HasAlertState = true;